PHP version check from the theme info in styles.css header comment

Author: vvv3

functions.php

@@ -12,14 +12,12 @@
  * @package    Starter Kit
  */
 
-if (PHP_VERSION_ID < 80100) {
-    $activeTheme        = wp_get_theme();
-    $requiredPhpVersion = $activeTheme->get('RequiresPHP');
+$activeTheme        = wp_get_theme();
+$requiredPhpVersion = $activeTheme->get('RequiresPHP');
 
+if ($requiredPhpVersion && version_compare(PHP_VERSION, $requiredPhpVersion, '<')) {
     error_log(sprintf(__('Theme requires at least PHP %s (You are using PHP %s) '), $requiredPhpVersion, PHP_VERSION));
-    if (!is_admin()) {
-        wp_die(__('Theme requires a higher PHP Version. Please check the Logs for more details.'));
-    }
+    wp_die(__('Theme requires a higher PHP Version. Please check the Logs for more details.'));
 } else {
     try {
         // helper debug functions for developers